Patents by Inventor Ryoichi Kondo
Ryoichi Kondo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8583073Abstract: A mixer includes an adder that inputs a first high-frequency signal and a second high-frequency signal for local use, adds the first high-frequency signal and the second high-frequency signal, and outputs as an addition signal; a magnetoresistive effect element that includes a fixed magnetic layer, a free magnetic layer, and a non-magnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer, and is operable when the addition signal has been inputted, to multiply the first high-frequency signal and the second high-frequency signal included in the addition signal using a magnetoresistive effect to generate a multiplication signal; a magnetic field applying unit applying a magnetic field to the free magnetic layer; and a first impedance converting unit that is passive, inputs the multiplication signal outputted from the magnetoresistive effect element, converts the multiplication signal to a lower impedance than an input impedance, and outputs the converted signal.Type: GrantFiled: July 28, 2011Date of Patent: November 12, 2013Assignee: TDK CorporationInventors: Yuji Kakinuma, Ryoichi Kondo
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Patent number: 8285224Abstract: A transmitter/receiver for radio communication according to an embodiment of the present invention has: a transmission circuit for generating a transmission signal; a demodulation circuit for demodulating a receive signal; an antenna circuit for transmitting the transmission signal from the transmission circuit and receiving the receive signal and guiding the receive signal to the demodulation circuit; a phase shift circuit which is connected between the transmission circuit and the antenna circuit; and a switching circuit which switches between outputting a superimposed signal of the transmission signal and the receive signal between the phase shift circuit and the antenna circuit to the demodulation circuit, and outputting a superimposed signal of the transmission signal and the receive signal between the transmission circuit and the phase shift circuit to the demodulation circuit.Type: GrantFiled: July 17, 2008Date of Patent: October 9, 2012Assignee: TDK CorporationInventors: Ryoichi Kondo, Shinichirou Mochizuki
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Publication number: 20120025926Abstract: A mixer includes an adder that inputs a first high-frequency signal and a second high-frequency signal for local use, adds the first high-frequency signal and the second high-frequency signal, and outputs as an addition signal; a magnetoresistive effect element that includes a fixed magnetic layer, a free magnetic layer, and a non-magnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer, and is operable when the addition signal has been inputted, to multiply the first high-frequency signal and the second high-frequency signal included in the addition signal using a magnetoresistive effect to generate a multiplication signal; a magnetic field applying unit applying a magnetic field to the free magnetic layer; and a first impedance converting unit that is passive, inputs the multiplication signal outputted from the magnetoresistive effect element, converts the multiplication signal to a lower impedance than an input impedance, and outputs the converted signal.Type: ApplicationFiled: July 28, 2011Publication date: February 2, 2012Applicant: TDK CORPORATIONInventors: Yuji KAKINUMA, Ryoichi KONDO
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Patent number: 8019315Abstract: A mixer includes a magnetoresistive effect element, a magnetic field applying unit, and an impedance circuit. The magnetoresistive effect element includes a fixed magnetic layer, a free magnetic layer, and a nonmagnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer, is operable when a first high-frequency signal and a second high-frequency signal as a local signal are inputted, to multiply the first high-frequency signal and the second high-frequency signal according to a magnetoresistive effect to generate a multiplication signal. The magnetic field applying unit applies a magnetic field to the free magnetic layer. The impedance circuit has a higher impedance for the multiplication signal than an impedance for the first high-frequency signal and the second high-frequency signal and is disposed between an input transfer line, which transfers the first high-frequency signal and the second high-frequency signal, and the magnetoresistive effect element.Type: GrantFiled: May 26, 2010Date of Patent: September 13, 2011Assignee: TDK CorporationInventors: Yuji Kakinuma, Ryoichi Kondo
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Publication number: 20100301919Abstract: A mixer includes a magnetoresistive effect element, a magnetic field applying unit, and an impedance circuit. The magnetoresistive effect element includes a fixed magnetic layer, a free magnetic layer, and a nonmagnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer, is operable when a first high-frequency signal and a second high-frequency signal as a local signal are inputted, to multiply the first high-frequency signal and the second high-frequency signal according to a magnetoresistive effect to generate a multiplication signal. The magnetic field applying unit applies a magnetic field to the free magnetic layer. The impedance circuit has a higher impedance for the multiplication signal than an impedance for the first high-frequency signal and the second high-frequency signal and is disposed between an input transfer line, which transfers the first high-frequency signal and the second high-frequency signal, and the magnetoresistive effect element.Type: ApplicationFiled: May 26, 2010Publication date: December 2, 2010Applicant: TDK CORPORATIONInventors: Yuji KAKINUMA, Ryoichi KONDO
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Publication number: 20090027169Abstract: A transmitter/receiver for radio communication according to an embodiment of the present invention has: a transmission circuit for generating a transmission signal; a demodulation circuit for demodulating a receive signal; an antenna circuit for transmitting the transmission signal from the transmission circuit and receiving the receive signal and guiding the receive signal to the demodulation circuit; a phase shift circuit which is connected between the transmission circuit and the antenna circuit; and a switching circuit which switches between outputting a superimposed signal of the transmission signal and the receive signal between the phase shift circuit and the antenna circuit to the demodulation circuit, and outputting a superimposed signal of the transmission signal and the receive signal between the transmission circuit and the phase shift circuit to the demodulation circuit.Type: ApplicationFiled: July 17, 2008Publication date: January 29, 2009Applicant: TDK CORPORATIONInventors: Ryoichi KONDO, Shinichirou MOCHIZUKI
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Patent number: 7125788Abstract: A circuit device includes at least one under bump metal formed on a surface of a substrate and a connection bump provided on the uppermost layer of the under bump metal. At least one laminated metallic film is formed on part of or all of wiring pattern formed on the surface of the substrate, so that the laminated metallic film formed consists of the same material and has the same thickness as the under bump metal.Type: GrantFiled: March 4, 2005Date of Patent: October 24, 2006Assignee: TDK CorporationInventors: Takaaki Domon, Toshiyuki Nagatsuka, Tsutomu Yasui, Ryoichi Kondo
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Publication number: 20050224972Abstract: A circuit device comprises at least one under bump metal formed on a surface of a substrate and a connection bump provided on the uppermost layer of the under bump metal. At least one laminated metallic film is formed on part of or all of wiring pattern formed on the surface of the substrate, so that the laminated metallic film formed is consisted of the same material and also the same thickness as the under bump metal.Type: ApplicationFiled: March 4, 2005Publication date: October 13, 2005Applicant: TDK CorporationInventors: Takaaki Domon, Toshiyuki Nagatsuka, Tsutomu Yasui, Ryoichi Kondo
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Patent number: 6570442Abstract: A radio frequency signal output module having a power amplifier and an isolator element is provided in which a radio-frequency output stage can be largely reduced in size and thickness. The radio frequency signal output module comprises a dielectric multilayer substrate; a radio-frequency power amplifier circuit; an isolator element; an impedance matching circuit which is inserted and connected between the radio-frequency power amplifier circuit and the isolator element; and a feedback loop for controlling the gain of the radio-frequency power amplifier circuit. The radio-frequency power amplifier circuit, the isolator element, the impedance matching circuit, and the feedback loop are integrally mounted on the dielectric multilayer substrate, and the feedback loop is branched from the impedance matching circuit, and connected to the radio-frequency power amplifier circuit.Type: GrantFiled: August 7, 2001Date of Patent: May 27, 2003Assignee: TDK CorporationInventors: Shinya Nakai, Ryoichi Kondo
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Patent number: 6462628Abstract: An isolator device with a built-in power amplifier includes a single dielectric multi-layered substrate, a high frequency power amplifier circuit, an isolator element, and circuit elements provided to the dielectric multi-layered substrate. The high frequency power amplifier circuit and the isolator element are connected with each other through the circuit elements and united with the single dielectric multi-layered substrate.Type: GrantFiled: March 26, 2001Date of Patent: October 8, 2002Assignee: TDK CorporationInventors: Ryoichi Kondo, Takahide Kurahashi, Shinya Nakai, Hajime Kato
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Publication number: 20020017952Abstract: A radio frequency signal output module having a power amplifier and an isolator element is provided in which a radio-frequency output stage can be largely reduced in size and thickness. The radio frequency signal output module comprises a dielectric multilayer substrate; a radio-frequency power amplifier circuit; an isolator element; an impedance matching circuit which is inserted and connected between the radio-frequency power amplifier circuit and the isolator element; and a feedback loop for controlling the gain of the radio-frequency power amplifier circuit. The radio-frequency power amplifier circuit, the isolator element, the impedance matching circuit, and the feedback loop are integrally mounted on the dielectric multilayer substrate, and the feedback loop is branched from the impedance matching circuit, and connected to the radio-frequency power amplifier circuit.Type: ApplicationFiled: August 7, 2001Publication date: February 14, 2002Applicant: TDK CORPORATIONInventors: Shinya Nakai, Ryoichi Kondo
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Publication number: 20010017576Abstract: An isolator device with a built-in power amplifier includes a single dielectric multi-layered substrate, a high frequency power amplifier circuit, an isolator element, and circuit elements provided to the dielectric multi-layered substrate. The high frequency power amplifier circuit and the isolator element are connected with each other through the circuit elements and united with the single dielectric multi-layered substrate.Type: ApplicationFiled: March 26, 2001Publication date: August 30, 2001Applicant: TDK CORPORATIONInventors: Ryoichi Kondo, Takahide Kurahashi, Shinya Nakai, Hajime Kato
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Patent number: 5756215Abstract: A rectangular plate shaped rapid temperature rise heater element includes a sintered insulating ceramic layer, an exothermic section, and first and second lead layers for applying voltage across the exothermic section to develop heat. Typically the sintered insulating ceramic layer, exothermic section, and lead layers are formed of ceramic compositions composed mainly of an identical insulating component in the form of a metal oxide, typically Al.sub.2 O.sub.3 and an identical conductive component in the form of a metal silicide and/or carbide, typically MoSi.sub.2, blended in different ratios for the respective layers. The heater element is easy and inexpensive to manufacture, capable of rapid heating, and durable.Type: GrantFiled: July 20, 1994Date of Patent: May 26, 1998Assignee: TDK CorporationInventors: Kentaro Sawamura, Nobuyuki Miki, Masahiro Kitajima, Etsuo Mitsuhashi, Masatada Yodogawa, Shinichi Sato, Akio Okamura, Ryoichi Kondo
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Patent number: 5260237Abstract: An overcoating inorganic composition is applied to a ceramic substrate for forming an overcoat thereon which has improved flexural strength, matches in thermal expansion with the substrate, and is reliable in that it is free of a crack and causes no variation in the resistance of thick film resistors even under rigorous service conditions. The overcoating inorganic composition contains 70-90% by volume of an inorganic glass component and 10-30% by volume of mullite powder and has a coefficient of thermal expansion in the range of from 50.times.10.sup.-7 to 75.times.10.sup.7 /.degree. C.Type: GrantFiled: March 11, 1992Date of Patent: November 9, 1993Assignee: TDK CorporationInventors: Hideaki Ninomiya, Toshinobu Miyakoshi, Ryoichi Kondo, Takashi Kamiya
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Patent number: 4930566Abstract: In a method for continuous casting of an aluminum-lithium alloy through an open-ended mold for forming an ingot, wherein gas under pressure is brought into contact with a molten surface part of said ingot directly before solidification, the gas used consists of from 1 to 15 volume % of oxygen and balance of inert gas. The casting is stabilized and cast skin is improved by the use of said gas.Type: GrantFiled: September 22, 1989Date of Patent: June 5, 1990Assignee: Showa Denko Kabushiki KaishaInventors: Shigeru Yanagimoto, Ryoichi Kondo